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Lung tumor

Lymphoma and lymphoid infiltrates

BALT lymphoma

Reviewer: Deepali Jain, M.D. (see Reviewers page)
Revised: 22 January 2013, last major update September 2012
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.

General
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● Lymphoma of Bronchus Associated Lymphoid Tissue
● Rare type of low-grade, primary pulmonary MALT lymphoma
● Often need gene rearrangement studies to diagnose
● Indolent with good prognosis

Case reports
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● 41 year old woman with clonality by gene rearrangement but not by flow cytometry (Arch Pathol Lab Med 2003;127:115)

Micro description
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● Centrocyte-like lymphocytic proliferation in bronchiolar submucosa with lymphoepithelial lesions, reactive lymphocytes and plasma cells
● Bland appearance

Micro images
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H&E with lymphoepithelial lesions

Differential diagnosis
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● Reactive hyperplasia

End of Lung tumor > Lymphoma and lymphoid infiltrates > BALT lymphoma

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